Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
: S4 g5 E8 T$ E( e* ]8 j$ i1 l8 R5 {NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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- @# ^. p/ l9 m. E1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
# x) H U9 u' L. C* I! M1 L2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan * g- ]9 @2 g& C6 P
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ; l; Q$ T3 K, f" ?( l
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan ( Z7 J1 Y6 [7 ]1 p/ u
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan * a' ] H& F, J$ H. V- W8 b. u p
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 2 M2 A$ X# n- T, f! {& ^! c( a
7Kinki University School of Medicine, Osaka 589-8511, Japan
. J# P. |0 c! A$ }8Izumi Municipal Hospital, Osaka 594-0071, Japan ( F' W9 d, M: x+ h* c. o) e4 j
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan % ? c# j0 G, K+ E p8 y
Correspondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp
6 G7 e5 S: e5 C0 j& I1 O* {7 t/ zAbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type.
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